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Hi,
i would like to put a camera for a security in a place in different city. Which steps do i need to do?
(i have knowledge and a bit experience in C and embedded Linux)
do i need to supply a normal house internet to watch over camera, or is there any other services for such porpuses...
Hi,
something confuses me about Linker settings of Eclipse.
When i need to use thread or opencv, i have to add library in linker.
As i know, linker converts the object (*.o) files to executable file. Why does it require .h or .c files if it works with .o files.
thank you
best regards
Hi,
In some positions, they say, "... who has experience with xxx architecture..."
Why is it matter to have experience with a specific architecture? Communication protocols are same, (SPI, I2C, CAN..) even in different microcontrollers.
Why is it important to know architecture of...
sorry ,
when the circuit comes, it wil work with 1 khz,
but on the simulation, i switched the igbt on different times, unabhangig from 1khz.
actually diL/dt and dic/dt is same, because
IC =collector current, dic/dt = increase rate of the collector current,
IL = current of the parasitic...
Hi KlausST
i expect max 4500V, i used a voltage divider to make it 1000 times smaller, (on the simulation it is 2900V)
after the opamp, i added RC to get derivation.
but, problem is , rc doesnt stay on peak value long like on the graph.
thank you
Hi,
from the formula,
VL = L.diL/dt
with the voltage drop on the inductance, i want to calculate dil/dt, increase rate of the current.
frequency is constant, 1khz. it is parasitic inductance, only for test different time is used.
it is max -15volt till 15volt, 8bit should be enough.
Hi SunnySkyguy,
thanks for the answer,
yes i need to measure it every cycle, so every 0.5khz
it is to measure, voltage increase and decrease of the igbt
- - - Updated - - -
Hi KlausST
it is the voltage of an igbt during the switching, my purpose is measuring the dVce/dt and -dVce/dt...
sorry,
goal is the measuring voltage drop to calculate dic/dt.
it is switching frequency of the IGBT.
i dont know the impedance of the signal.
i guessed any resolution after 8 would work fine.
Hallo,
i want to have an ADC to get 0-3.3V output voltage and 0-5V input voltage.
(Some adc has Vdrv pin, which decides output voltage, but some of them dont have this.)
If i use an voltage divider at the output of ADC, to get 3.3 from 5V. would my signal still be accurate, is it logical to...
hi Klauss,
thank you for your answer,
it is voltage drop on an inductor.
i used a voltage scale with 3 resistors. pulled to voltage between 0-2V. and used 40mhz as you suggested.
the to measure voltage drop on the inductance during switching the semiconductor.
Hi,
i should measure very fast changing signal with ADC, but ADCs has very narrow input voltage range at the high frequencies,
signal peaks i need to measure is between 10V to -5V. Signal looks like on the following photos.
it needs ADC like around 30mhz i guess, and they can not measure...
Hi,
i want to measure dVce/dt,
for that i used a differential amplifier(i need Vce too), after that i put a RC circuit to get dVce
problem is, dVce peak value change too fast, ADCs are soo expensive. changing RC doesnt help because output of the opamp change to fast. Circuit looks like on the...
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